Fulley-block.



'which will n'ioie -nily lier the pesent GUY C. SNBMYBE, 0E BUCOD., WASEIHGTQN.

PULLEY-BLOGK.

Specicatifon of Letters Patent.

Peeenlzed Dee. 27, 39M?.

-eppiieeem am maren si, me. ,semi ne. www.

To al 'whom i may concern:

Be lils known that i., GUY C. Sinni/lynn, a citizen of lthe Unitefi States, 'residing at Bucoda, in the county of Thurston and State of Washin ,ejwn7 have inveneii nevr and useful mprovemen's in Pulley-Blocks, of which the following is n specification.

This invention relates to improvements in pulley blocks and has for its Object the provision o1 n device 'of that linfi, the frame of which includes :i pair nfside inembers connected together by a hub ni' '-ielfa tively large diameter and a Slieave rotatably mounted on Saifl hub. f

Another Objectis the provision of a frame the side members of wlxili nire vproviiled on their oppoe'ed inneil surfaces willi cox-inten sunk portions the onlin' Sides of which con stitue Shoulders which overhang the alge of the Sheave, whereby the finngm' of lille line fouling Wili ille Siile miniinfifi will liei'pfisL tiveiy prevented.

A ui'her olnjeci the inrovieion of n lnib )eipliei'nlly provided li n Home :and a sheave provided on its innen enifune with a groove cnpeming with ein, gmx-ve i illu: hub to pirnvie :i nifl n nimm? y of heli o? roller beningsi :i :i1-ris f l in @nifl mee.

With tin and other i fie/els .in View, nnf'ei appear. vention consifsts in certain novel details of eonsli'ncion and arnngemen'. .of parte, hereinafer fully described7 and more pe'if'ulnriy pointed ont in tin,- up penleci eieim; it being' understood that vnious changes in elle form. proportion. size, and. minor deaile of the device may be ncle within line ope of the appended claim, Without departing* from ille spirit ox: sfn'i'iiici'ig any of lie ziflvzinlnges of the invention. I

linie zi-f'vmnpnnyii; r iir'nwinfgjel. loming n part oi the epe finition gf-lignie ie n. ne tional end. elevn'liion 0i' .llie device. is i Sectional i'mll. elevation on the lin of Fig. l.

Similainnnieiaisv of reference are ernployecl to designate corresponding 'paris ihi'ougliont. v

The freine of tim block includes n pair mi side members designa/rml in general by of elle sheave to be employed. y reference feo Fig. it 'will be eeen tigal: formed on the inner snrfne nf the member 6 and at subs'nntially lne ceninl portion thereo" is :1 eylindfical shoulder 7, the said shoulder having/n central @peiling lhe inner end of which is counlerbored ae shown at 8.

Formed at the central portion and on the inner face of the opposie side member 5 is a eylindieal shouiiier 9 coiies'pondiifig in dianietei to the diameter of the shoulder Y, the said shoulder 9 being centrally pzovided. Wii'li a circular boss 100i? a diameter to nicely [it Within thve countefboe 8 of the shoulder 7. The shoulder 9 is centraliy pro vided with an opening te aline wiel; the

centinl opening of the shoulder "i, these aiming openings receiving e, pin or lieii; l, one emi of which its previfieel Wiiii a. heed i2 :and the opposite end inencleei- '-o rei-(five :1 nut n rving. eecnie ine pin nggninsl ilisplneeni in 'allie members ami fuz'ilmr Serving' er: cinznp the z''aeinlnm; iii gelie, :le Shown in i..

By i'eiiei'nnee now te il" .l eeen lial; 'the oppneeei intl Y env'n inenilieie 5 :mei l :i in' Ciimiini cminlersinle ifi side of these enunteininhs shoulders ll. i

The sliezwe is ilesignzieii by the nnmerai 1T and in thickness enrrespondsle the dieH inneebetneen die surfaces of the animiersinlis le und 1.5 and in dinmeiei Sen'iewlza'e lese than the widest portion of the seid eouniei'sinks. The shenve is centrally picon vided with nn openingio receive lne hub formed by the Cirenlax' .finonldex'e and 9 and 'when :ii''ange on the nnb liie shoulders LG -will overlie ille edge of lli@ elieave. whereby the danger if 'line line fouling with ain-, l5. i einer wmtituling ille side member#` und (l will lie posiliiveiy' prevented. Pe 'ilminl groovefinreformed on iin; infn sec T anni 5l? anni formed in elle inner: periphery of the lnili is, a. groove corresponding' in wicih in ille mnnli'ii'xefl. widilzs "l" ille grooves an arranged con- (eunl'r'io- Min file Seid gleuven, lie fmr'e of the .waive :sini lie Sni moves i8 copernl'ing lo pz'eseni, a. z'sn'ze :For l'lie iieception i lmll oi' lief-ming' i'oilewA (l. lll/ ith l'lis con- S'i'i'iciiim i Twill ile inzil'iiliest llini lie eliezive will rolzie on elle bearing' iollei's l9,.\.vhee

i the iimly portions oi: these members are sul:` l i'nzi ine 'friction helwnen the Shezive anni its il" stantially @inni-cirenier in conour and someioilrnnl will be greatly i'efluceci. what greater in diameter than tlf/.e (lialneler I yion'i lie foregoing. 1f. isy evident that have provided e device which is compara.- tively simple in structure and inexpensive in manufacture; embodying few parts und these so arranged that the danger of derungement will be reduced to n minimum.

In a 'pulley block, e freine including a pair of eide neinbere Countersnnic on their inner faces, n hnb section formed in the countersunk, portion 'of one o said side members and projecting beyond `the inner surface of said side nieniber, the said hubV section having n contrai boite the inner end of `which is counterbored, a .hub section formed in the eonnterennk portion of the opposite side member and projecting beyond the inner surface of said nieniber and terminating in a reduced boss receivable by the eounterbore of the first-named hub section, said second hub Section being provided with :i bore to adinewith the bore of the rstnamed hub Section, Sai-d hub sections being peripheraily provided with circuiar rabbets which Cooperate to form a circuler groeve when bhev4 Suid hub sections bear one upon the other, a sheave arranged in the countersunk portions of said side members and having a. Central opening to receive said hub seeiione, the lnediai portion of the wail of said opening being provided with' n circuiar groove alining with the groove formed by said rubbers, :ind a` iuraiity of bearing reliers arranged in snif. grooves.

in testimony Where-oil affix my eignaure in presence of two Witnesses.

GUY C. ennnni'nn.

Witnesses Jon Kimm), J. L. Swim'. 

